Set the name of the exported pdf file after ssrs is printed on the screen

Finance and Operations/AX
1

I use the following code to print multiple ssrs on the screen, and then export to pdf, but I found that the file name of all pdf is composed of the last printed salesid：

public static void main(Args _args)
    {
        utcDateTime timeInUserTz = DateTimeUtil::applyTimeZoneOffset(DateTimeUtil::utcNow(), DateTimeUtil::getUserPreferredTimeZone());

        // TODO: Review the format
        str printTime = System.String::Format('{0:yyyyMMdd HH:mm}', timeInUserTz);

        CustPackingSlipJour   custPackingSlipJour = _args.record();
        CustPackingSlipTrans  custPackingSlipTransTmp,custPackingSlipTrans;
        Set                   salesIdSet = new Set(Types::String);

        while select OrigSalesId 
            from custPackingSlipTransTmp
                group by OrigSalesId
                where custPackingSlipTransTmp.SalesId == custPackingSlipJour.SalesId
                && custPackingSlipTransTmp.PackingSlipId == custPackingSlipJour.PackingSlipId
                && custPackingSlipTransTmp.DeliveryDate == custPackingSlipJour.DeliveryDate
        {
            salesIdSet.add(custPackingSlipTransTmp.OrigSalesId);
        }

        SetEnumerator enumerator = salesIdSet.getEnumerator();

        while (enumerator.moveNext())
        {
            SalesId parmSalesId = enumerator.current();

            DeliveryCreditNoteController controller = new DeliveryCreditNoteController();
            controller.parmTableRecId(custPackingSlipJour.RecId);
            controller.parmSalesId(parmSalesId);
            controller.parmReportName(ssrsReportStr(DeliveryCreditNoteReport, Report));
            controller.parmShowDialog(false);

            **controller.parmDialogCaption(parmSalesId+'_'+printTime);**

            SRSPrintDestinationSettings settings = controller.parmReportContract().parmPrintSettings();
            settings.printMediumType(SRSPrintMediumType::Screen);

            controller.parmExecutionMode(SysOperationExecutionMode::Synchronous);
            controller.startOperation();
        }
    }

I tried to use the

 controller.parmDialogCaption(parmSalesId+'_'+printTime)

line of code to control the exported file name, but it didn’t work, how can I modify the code to achieve my purpose